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FR5 Epoxy Fiber Glass sheet

FR5 Sheet is a high-performance thermosetting material that offers exceptional mechanical and electrical properties. Reinforced with epoxy glass fiber cloth, this flame-retardant sheet  meets the UL94-V0 standard. With a good long-term high service temperature of 150°C (302F) or higher, it is designed to withstand extreme temperatures without losing its structural integrity.

The FR5 sheet boasts excellent machinability, making it easy to work with and shape according to your needs. Its heat and moisture resistance are unparalleled, ensuring that it maintains its dry and wet electrical performance even in the harshest of environments. Additionally, its low water absorption ensures that it stays intact and free from deformation over time.

It’s in compliance with the requirements of NEMA/MIL-I-24768/2/GB / T1303.1-2009 / IEC 60893-1:2004.  Natural color is light green, yellow, and black can be custom.




Black, Light Green

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Details about FR5 Epoxy Fiber Glass sheet

FR5 Epoxy Fiber Glass Sheet Size
Thickness(mm)Width* Length(mm)



.004″–8″40″ x 48″

48″ x 80″



What’s the difference between FR5 and G11?

The FR5 grade shares similarities with the G10/FR4 grade but exhibits superior mechanical properties at elevated temperatures and can operate at higher temperatures.

G10/FR4 Tg<150℃ (302F), FR5/G11 Tg≥150℃ (302F)

The key distinguishing feature between the FR5 and NEMA Grades G11 is that the FR5 grade is specially formulated to be fire-retardant while G11 is not.

● Chemical machine parts , general machine parts and gear ,and generators, Pads, base, baffle etc..
● Generator ,transformer, fixture, inverter, motor and electric insulation component.


1. Other sizes, and colors can be customized.
2. Length, width, diameter, and thickness tolerances may vary by manufacturer.


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